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Anne Elk
BrontosaurusTheorist



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Anne Elk
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PostTue May 14, 2019 3:26 pm 
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An interesting article today in the NYTimes about the unforseen consequences of introducing non-native fish for the sport industry.  Not one of Teddy Roosevelt's best ideas.   frown.gif

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...the lake trout went on to gorge on the young of the cutthroat trout, and the population of the native subspecies plummeted. Because there were fewer cutthroat trout around to eat them, large water fleas soon proliferated. The water fleas in turn gobbled up the microscopic plants at the bottom of the food web, causing the lake water to become clearer and probably also warmer near the surface, according to a new study published in the journal Science Advances. When the cutthroat trout largely vanished from the shallow waters they prefer, the lake trout didnít take their place, because they like deeper waters. So the switch deprived ospreys, white pelicans, bald eagles and other fish-eating birds of their main food source.

...and so on up the chain to the griz also.

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"There are yahoos out there.  Itís why we canít have nice things."  - Tom Mahood
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Gregory
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PostThu May 16, 2019 8:58 am 
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https://www.nps.gov/noca/learn/nature/upload/NOCA_Chelan_Fish_NPSpecies_Report_20160321_comp.pdf
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Forum Index > Stewardship > Chain of Species Destruction at Yellowstone
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